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Finding the Fourth Proportional to 474,657.80, 711,986.70 and 400,008.20

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Solution

The fourth proportional to 474,657.80, 711,986.70 and 400,008.20 is: 600,012.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    474,657.80 : 711,986.70 = 400,008.20 : x
  2. Step 2: Convert to fraction form
    474,657.80/711,986.70 = 400,008.20/x
  3. Step 3: Cross multiply
    474,657.80x = 711,986.70 × 400,008.20
  4. Step 4: Simplify right side
    474,657.80x = 284,800,518,290.94
  5. Step 5: Solve for x
    x = 284,800,518,290.94/474,657.80
  6. Step 6: Final answer
    x = 600,012.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.